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Old 3rd October 2017, 18:06   #11  |  Link
mkver
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Join Date: May 2016
Posts: 197
FYI: mkvmerge does not strip an extension away. If I mux the streams with mkvmerge id 3 or 4* alone I get files with size 2.8 MiB. MediaInfo 0.7.99 has the following to say about the file with the German track:
Code:
General
Unique ID                                : 245046857353978534520836163522779116025 (0xB85A4EDB6BD25BCBB0D8010ED44371F9)
Complete name                            : I:\The Great Wall\STREAM\00245_0.mka
Format                                   : Matroska
Format version                           : Version 4 / Version 2
File size                                : 2.81 MiB
Duration                                 : 20 s 384 ms
Overall bit rate mode                    : Constant
Overall bit rate                         : 1 155 kb/s
Encoded date                             : UTC 2017-10-03 16:43:44
Writing application                      : mkvmerge v16.0.0 ('Protest') 64-bit
Writing library                          : libebml v1.3.5 + libmatroska v1.4.8

Audio
ID                                       : 1
Format                                   : E-AC-3
Format/Info                              : Enhanced Audio Coding 3
Format settings, Endianness              : Big
Codec ID                                 : A_EAC3
Duration                                 : 20 s 384 ms
Bit rate mode                            : Constant
Bit rate                                 : 500 b/s
Channel(s)                               : 6 channels
Channel positions                        : Front: L C R, Side: L R, LFE
Sampling rate                            : 48.0 kHz
Frame rate                               : 187.500 FPS (256 SPF)
Compression mode                         : Lossy
Stream size                              : 2.80 MiB (100%)
Service kind                             : Complete Main
Default                                  : Yes
Forced                                   : No
So eac3to was right about the bitrate and MediaInfo is buggy. For the French track the situation is a bit more complicated:
Code:
General
Unique ID                                : 181109783328528269767092120785351483635 (0x884079B9EF4E2234A69025BC420A20F3)
Complete name                            : I:\The Great Wall\STREAM\00245_0 (1).mka
Format                                   : Matroska
Format version                           : Version 4 / Version 2
File size                                : 2.81 MiB
Duration                                 : 20 s 384 ms
Overall bit rate mode                    : Constant
Overall bit rate                         : 1 155 kb/s
Encoded date                             : UTC 2017-10-03 16:49:14
Writing application                      : mkvmerge v16.0.0 ('Protest') 64-bit
Writing library                          : libebml v1.3.5 + libmatroska v1.4.8

Audio
ID                                       : 1
Format                                   : E-AC-3
Format/Info                              : Enhanced Audio Coding 3
Format profile                           : E-AC-3+Atmos / E-AC-3
Format settings, Endianness              : Big
Codec ID                                 : A_EAC3
Duration                                 : 20 s 384 ms
Bit rate mode                            : Constant
Bit rate                                 : 500 b/s
Channel(s)                               : 11 objects / 6 channels
Channel positions                        : 11 objects / Front: L C R, Side: L R, LFE
Sampling rate                            : 48.0 kHz
Frame rate                               : 187.500 FPS (256 SPF)
Compression mode                         : Lossy
Stream size                              : 2.80 MiB (100%)
Service kind                             : Complete Main
Default                                  : Yes
Forced                                   : No
Besides being wrong about the bitrate, MediaInfo 0.7.99 claims that somehow this track contains an Atmos extension. Don't know if this is true. (It claims that there are 11 objects in this track when one examines the original m2ts file.) MediaInfo 0.7.92.1 does not detect an Atmos extension in the French track (and not in the German track). I don't know which version of MediaInfo claims that these tracks are 576 kb/s.
By the way, if I use ffmpeg to copy these streams, the same applies.
If one extracts the streams, MediaInfo claims they 13h 2m long. I don't know if the bitrate is miscalculated resulting in the wrong duration or if it's the other way around. Probably the former.

*: mkvmerge assigns id 0 to the video track, id 1 to the TrueHD Atmos stream, 2 to the core embedded in the TrueHD Atmos stream, 3 to the French and 4 to the German track.
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